CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade VII - Exponents and Powers
Question 1
1.
    • Expand the following base power
    • (-3) 4
       
  • -243
  • 1296
  • 81
  • -2187
  • -27
Question 2
2.
    • (
      9
      5
      		)
      -6
      ✕
      (
      10
      3
      		)
      -4
      ✕
      (
      13
      (-2)
      		)
      3
      (
      9
      (-2)
      		)
      4
      ✕
      (
      10
      5
      		)
      -2
      ✕
      (
      13
      5
      		)
      3
    • =
  • 9
    (-22)
    ✕
    10
    (-1)
    ✕
    13
    (-21)
  • 9
    (-22)
    ✕
    10
    (-2)
    ✕
    13
    (-21)
  • 9
    (-22)
    ✕
    10
    (-2)
    ✕
    13
    (-20)
  • 9
    (-21)
    ✕
    10
    (-2)
    ✕
    13
    (-21)
Question 3
3.
    • 3
      d
      5
      .
      2
      d
      8
    • =
  • 5
    d
    40
  • 5
    d
    13
  • 6
    d
    13
  • 13
    d
    6
  • 6
    d
    40
Question 4
4.
    • (
      s
      4
      t
      2
      		)
      u
    • =
  • s
    4
    u
    .
      −  
    t
    2
    u
  • t
    2
    u
    s
    4
    u
  • s
    4
    u
    .
    t
    2
    u
  • s
    4
    u
    t
    2
    u
Question 5
5.
    • Simplify the expression
    •    
      6
      (
      8
      3
      )
           
    • ✕
    •    
      6
      (
      5
      3
      )
           
    • ✕
    •    
      6
      (
      7
      4
      )
           
  •    
    5
    (
    70
    9
    )
         
  •    
    6
    (
    68
    9
    )
         
  • 8 6
     
  •    
    7
    (
    70
    9
    )
         
  •    
    6
    (
    70
    9
    )
         
Question 6
6.
    • Find the prime factorization of
    • 21168
  • 2 4
     
    		✕
    3 3
     
    		✕
    7
  • 2 2
     
    		✕
    3 3
     
    		✕
    7 2
     
  • 2 4
     
    		✕
    3 3
     
    		✕
    7 2
     
  • 2 5
     
    		✕
    3 3
     
    		✕
    7 2
     
  • 2 4
     
    		✕
    5 3
     
    		✕
    7 2
     
Question 7
7.
Represent the given small number in standard form
0.05389821
✕
10 -9
 
  • 5.389821
    ✕
    10 -10
     
  • 5.389821
    ✕
    10 -11
     
  • 5.389821
    ✕
    10 -9
     
  • 5.389821
    ✕
    10 -13
     
  • 5.389821
    ✕
    10 -12
     
Question 8
8.
    • f
      17
      g
      20
      f
      7
      g
      6
    • =
  • f
    10
    g
    26
  • f
    37
    g
    13
  • f
    10
    g
    14
  • f
    24
    g
    14
  • f
    24
    g
    26
Question 9
9.
    • 8
      0
    • =
  • -1
  • undefined
  • 0
  • ∞
  • 1
Question 10
10.
    • Expand the following base power
    • (-5) -5
       
  • 1
    15625
  • (
    -1
    3125
    		 )
  • 1
    625
  • (
    -1
    32768
    		 )
  • (
    -1
    32
    		 )